Multi-layer FRP plate composite anchorage device and preparation method thereof

The invention discloses a multi-layer FRP plate composite anchorage device and a preparation method. A glue injection hole is formed in the side wall of the outer sleeve and is close to the first insertion groove; the inner sleeve is slidably connected to the inner wall of the outer sleeve. A second insertion groove corresponding to the first insertion groove is formed in the end, close to the top of the outer sleeve, of the inner sleeve. The positioning block is fixedly arranged in the inner sleeve and located on the side, away from the concrete beam, of the inner sleeve, and a plurality of positioning grooves are formed in the height direction of the positioning block at intervals. The height of the side, close to the second insertion groove, of the positioning groove is the same as the thickness of the FRP plate, and the height of the side, away from the second insertion groove, of the positioning groove is gradually increased along the projection of the vertical plane. The multiple pushing bolts are arran